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Bush__The_Essential_Physics_for_Medical_Imaging - Biomedical ...

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...*...!.....,:..":.., , ' ..-'."-...'."..- '-. ". ,,... '..'...SUBJECT INDEX(Ec- .Page numbers followed by f indicate figures;vpagc numbers followed by r indicate rablcsAABC. See Automa~ic brightness controlAbsolute risk, radiation biology 846Absolute speed, 161, I61 fAbsorptioneficiency, 154-155, 154f; 155fAbsorbed Dose. Ser doseAccelcrarion, 867Accessrandom, 70sequential, 70Accuracy, characterization of dara, countingstatistics, 661Acoustic impedance, ultrasound, 14,477, 477rAcoustic power, pulscd ultnsound intsnsity,549-551, 549f; 550rAcquisition, interface, 77Acquisition time, magnetic resonancc imaging, 430Activator, development, film processor, 180Active transport, radiopharmaccuticals, 621-622Activity, radionuclide decay, defined, 589, 590rAcute radiation syndrome (ARS), 83 1-837gxstrointestinal syndrome, 835hernatopoietic syndrome, 83M35, 834j'neurovascular syndrome, 835-836scquence of events, 832-833, 832f; 833rAdaptive histogram equaliza~ion, imagc quality,3 15AllCs. .See Analog-to-digital convertersAdded filtration, x-ray, 114Advisory bodics, radiation protccrion, 789-790Air gapas alternarive to antiscatter grid, 172-173, 173fscartered radiation, mammography, 207-2 10,209fAir kerma, 52-53AIARA. See As low as reasonably achievableAliasing, image quality and, 28.9287, 284f; 285J540f; 54 1Alph:~ decay, nuclear trans<strong>for</strong>mation, 593Alternating (AC) electric current, 116defined, 872-873, 873fAmcrican Standard Code <strong>for</strong> In<strong>for</strong>mationInterchange (ASCII), binary representationof tcxt, 65Ampere, defincd, 870Amplitude, electromagnetic wave, 17Analog dataconversion to digital <strong>for</strong>m, 6849represcntarion. 66Analog-to-digiral converters (ADCs), 68Anger camera. See Scintillation cameraAngiography,digital subtraction angiography, 321-322magnetic resonance imaging, 44246phase contrast, 445, 446ftime-of-flight, 44-45, 444 fAnr~ihilarion coincidence detection (AC.1)).emission tomography, 719Annihilation photons. positron annihilation, 36Annihilation radiation, 9. See I'ositronannihilation radiationAnnual limits on intake (ALls), 791Anode, 87, 105-1 12, 1 O6fcooling charr, 142-143, 142fgrounded, 195heat input chart, 142-143, 142fmammography, 194-195, 195f; 196fAntiscatrer grid, 168-1 73, 168J 207-2 10air gap as alternative to, 172-173, 208artifacts, 172Bucky factor, 17 1moving grid, 17 1Aperture blurring, image quality, 286-287, 286fArray processor, 78, 78j'Arrifactsantiscatter grid, 172, 172Jgradient field, 448machine-depcndent, 447magnetic resonance imaging, 447457processorHurter and Llriffkld curve effects, 181-182,I81fradi~t'requenc~, 449450radiofrequency coil, 449susceptibility, 447-448ultrasound, 524-53 1x-ray computed tomography, 369-372As low as reasonably achievable (ALARA),792

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